#include<linux/compat.h> #include<linux/compat_siginfo.h> #include<asm/compat_ucontext.h> #ifndef _ASM_PARISC_COMPAT_RT_SIGFRAME_H #define _ASM_PARISC_COMPAT_RT_SIGFRAME_H /* In a deft move of uber-hackery, we decide to carry the top half of all * 64-bit registers in a non-portable, non-ABI, hidden structure. * Userspace can read the hidden structure if it *wants* but is never * guaranteed to be in the same place. Infact the uc_sigmask from the * ucontext_t structure may push the hidden register file downards */ struct compat_regfile { /* Upper half of all the 64-bit registers that were truncated on a copy to a 32-bit userspace */ compat_int_t rf_gr[32]; compat_int_t rf_iasq[2]; compat_int_t rf_iaoq[2]; compat_int_t rf_sar; }; #define COMPAT_SIGRETURN_TRAMP 4 #define COMPAT_SIGRESTARTBLOCK_TRAMP 5 #define COMPAT_TRAMP_SIZE (COMPAT_SIGRETURN_TRAMP + COMPAT_SIGRESTARTBLOCK_TRAMP) struct compat_rt_sigframe { /* XXX: Must match trampoline size in arch/parisc/kernel/signal.c Secondary to that it must protect the ERESTART_RESTARTBLOCK trampoline we left on the stack (we were bad and didn't change sp so we could run really fast.) */ compat_uint_t tramp[COMPAT_TRAMP_SIZE]; compat_siginfo_t info; struct compat_ucontext uc; /* Hidden location of truncated registers, *must* be last. */ struct compat_regfile regs; }; /* * The 32-bit ABI wants at least 48 bytes for a function call frame: * 16 bytes for arg0-arg3, and 32 bytes for magic (the only part of * which Linux/parisc uses is sp-20 for the saved return pointer...) * Then, the stack pointer must be rounded to a cache line (64 bytes). */ #define SIGFRAME32 64 #define FUNCTIONCALLFRAME32 48 #define PARISC_RT_SIGFRAME_SIZE32 \ (((sizeof(struct compat_rt_sigframe) + FUNCTIONCALLFRAME32) + SIGFRAME32) & -SIGFRAME32) #endif